*
Manual range 1 , 30 - 80 dB range :
Display will show the unit of " 30 - 80 ".
*
Manual range 2 , 50 - 100 dB range :
Display will show the unit of " 50 - 100 ".
*
Manual range 3 , 80 - 130 dB range :
Display will show the unit of " 80 - 130 ".
4)
According to various measuring sound source, select the
Time Weighting ( Fast or Slow ) by pressing the " Time
Weighting Button " ( 3-8, Fig. 1 ).
Note :
a. If select the function of " Fast " time weighting, the
display will show the unit of " Fast ".
b. If select the function of " Slow " time weighting, the
display will show the unit of " Slow ".
5) Hold the instrument in hand and point the microphone at
measured noise source, the sound level value ( dB ) will be
displayed on LCD.
6) Max. Hold
If intend to maintain the maximum value, press
the " Max. Hold Button " ( 3-6, Fig. 1 ) and a " P.H "
symbol will show on the top LCD display. Press the
" Max. Hold Button again to exit the function.
Note :
a. When make the Max. Hold measurement under
slow varying noise environment, please select the
" Auto range "
b. When make the Max. Hold measurement under
pulse noise environment, it should select to the
convenient " manual range "
6
